Bushing inserting tool



Oct. 21, 1952 o. T. BRoYLEs BUSHING INSERTING TOOL 2 SHEETS-SHEET l Filed Oct. 8. 1947 O. T. BROYLES BUSHING INSERTING TOOL Oct. 21, 1952 SHEETS- SHEET 2 Filed Oct. 8, 1947 grwvmm lll! I 4 AW w ,Mm 4.

Patented Oct. 21, 1 952 Otis T. Broyles, Houston, Texuassignor, by direct andmesne assignments, to Associated Engi-v neers, Inc., Houston, Tex., a corporation of Application @ctolier V8, 194i?, SerialNo. 7778,665

tool..

- An object of the invention is to provide a well tool of the character` described adapted to' be lowered into 4a pipe which is located in a well bore and which is operative to punch a bushing through the pipe. `This bushing is provided with a ilow channel, orforice, therethrough through which uid may enter the pipe.

.It is, at times, desirable to introduce pressure fluid into the well tof assist in the flow of the well fluid through` the well tubing and when this becomes necessary the tool herein described may be lowered to the desired location and the bushing punched through the pipe to provide for the inflow of the pressure fluid and, if desired bush ings maybe inserted at diierent elevations for the introduction of this pressure uid.

It is another object of the present invention to provide a tool of the character described which is composed of few movable parts, the essential movable, parts being the bushing itself and an explosive actuated plunger for forcing the bushing through the pipe.

It is a further object of the invention to pro- Y vide, in a tool of the character described, means for quickly relieving ,the pressure generated by the explosion upon insertion of the bushing through the pipewall.

A further object of the invention resides in the provision of a novel Atype of bushing which may be effectively punched through the pipe but which cannot be displaced and which is formed of' hard, wear resistingmaterial so that it will not be readily cut out by the iniloiv of gritty duid therethrough.

The invention also embodies novel means for anchoring the tool at aselected place in the pipe.

Other objects and advantageswill be apparent from the following specification which is illustrated by the accompanying drawings wherein:

vFigure 1 is a vertical, sectional view oi the upper endof the tool while being lowered into a well pipe. Y

Figure 2 is a vertical,.sectional view of the lower end thereof. Y,

Figure 3 is a cross-sectional view takenon the line 3-3 of Figure 2.

Figure 4 is a fragmentary, side view of the carrier showing the orice bushing carried thereby.

Figure `5 is a vertical, sectional view of the lower end of the tool supported in rposition in the well.

Figure 6 is -a vertical, sectional view of the upperend of the tool succeeding the punching of This invention relatesto va bushing' inserting the bushinginto the well pipe and the tool. partlyv elevated. ,I

Figure 7 is a vertical, sectional, view of the lower end of the tool as shown in Fgure.

Figure 8 is an enlarged, longitudinal, sectional View of the oriiee bushing in the well tubing, and Figure 9 is an end View of the bushing. Referring now more particularly to the drawings wherein like numerals of reference Adesignate similar parts in each of the figures, the

numeral i designates a cylindrical body having Within this barrel there is aplunger 3 whose inner end fits snuglyu a radially extended barrel 2.

in the barrel but whose outer end is slightly reduced in diameter thus forming an externalA annular shoulder i around the plunger.

Within the outer end of the barrel there isan annular groove 5 and a snap ring 6 is locatedin this groove and forms a stop aga-instwhich the shoulder i engages to limit the outward Inove-` .ment of the plunger.

Secured to the outer end of the plunger there is a bushing "l which has a passageway 8 extendinglongitudinally therethrough. Thisv passageway, or channel, t may be of any selected transverse diameter and the bushing is formed of hard wear resisting material so thatit will not be readily cut out and enlarged by gritty iiuidl ilowing under pressure therethrough. i v

Any selected type of bushing may be usedb-ut what is now considered a preferred form of the bushing is shown. It is reduced in external diameter at its outer end and formed with the annular cutting edge 9, this reduction forming an external annular shoulder l0 near `the outer end of the bushing. It has been found in practice that this type of bushing will more readily penetrate the pipe. Also the bushing is provided with external ribs H which, preferably, are parallel but are arranged slightly diagonally with respect to the axis of the bushing and these ribs embed themselves into the material ofthe pipe around the punched hole to form a Very `secure anchor--` age for the bushing when it is inserted through the pipe wall. t t

The inner end of the plunger 3 is provided,with` a cavity l2 extending from the upper side of the plunger and terminating just above the lower side thereof for a purpose to `be hereinafter stated. t

Screwed into the upper end of the body l there.

is a coupling I3 jwhose lower end is provided with a powder chamber Ill. The upper end of this -chamber lli isreduced in diameter to receivela-1 primer cartridge l5.

chamber I1 communicates with the cavity I2 at "the rear, or inner, end of the plunger 3 and the'A plunger is maintained in position to assure this communication' by means of a frangible pin I8.

.- Screwedinto the upper endet. thecoupling .I3 there is an elongated gland I9 throughwhich Ythe ring pinY 20 slides axially and clamped be.l

tween the lower end of theV gland I9 and the opposing end of the coupling t3. there is a disc` 2| preferably formed of bronze or copper or other relatively soit material.

The lower endl of they firing pin 20 is provided with, pointY 22 which rests on.. the disc 2lA opposite the primer cartridge I when the. tool is assembledready, for. iiring,`

' Fitted over` the. reducedupper end of thegland I8. there is a capl3'vvhi'chmaybe pinned' t'o said glandby; means. offrangible pins,..as 2.4,. or other- Wise secured thereto. The4 :tiring pin-2D extends uplthrough andbeyond said cap..

Threaded onto the upper. endv oi" the cap 23 v arelthe jars 25 connected to which` there is. a. cable.. 26. by. means of which.r the tool maybe loweredinto and .Withdrawn fromthewell. Any conventional. type. of`r jars may be. employed.V

Provision has been. made for.. anchoring, the

toelaat-,any selected locationv in the` well pipe as. well as for efficiently releasing the. exhaust pres.

israbarrel 21 whose lower end carries agli-ide point 28 provided with suitable. outlet passageways',as. 29.

In the. barrel there is anfelongated sol-id. plung eri-whose upper end is-` enlarged, formingr a` l and whiclrnormally closes theV exhaust passageway-34 which-.leads downwardly throughthe bodyl from the` cylinderrZ',

' plunger V3l! is pinned; in its" upper position,

upon assembly of .thetoo'l,1 by meansLoithe.frane` glbl'epin 35.

Thebarrel 2-.1 is. provided with a plurality of.V

exhaust ports 36 which are. spaced beneath its upper end and. beneaththese exhaustports the barrelis provided with an insideannular shoulder' 31'on-which. the shoulder 3.2 landswhen. the-4 plunger-38` is moved to its lower position.

yThe barrel 21 is provided with aside slot 38 which isl cut through the barrelwall andv extend- 'y ing" downwardly fromsaid'side slot and aligned i therewith there is a groove 39 which forms a. continuation of the side slot and'pivotally mounted in said slot to work ona transverse axis there-is a supporting arm 40'. There is aleaf spring 4I whose upperv end is* secured tov the inside ofv the supporting arm' 48 and whose lower end' is incurved' andVV free andy bears against theA .4 bottom of the groove 39 so as to tend to hold the lower end of the supporting arm in its outer position extending outwardly beyond the barrel. The upper end of the arm 40 is extended above the pivot on which said arm works and the inner margin of said upper end is formed into a relatively 'narrow key"'42 which .works 1in ai longitudinalkeyway 43: in the plunger 30. Thiskeyway extends from the lower end of the plunger up 'toran intermediate point and terminates in an .upwardlyand outwardly flared end 44.

The upperend of the arm 40 is provided with anV inwardly.-directedshoulder 45. y

Sli'dablyrmountedon the barrel 21 above, and in'alignment'witli, the slot 38 there isa latch 46 whose lower end" isf provded'wi'th an external notchV 4.1 tofreceive.;v the shoulder 45, when the .latch is in its lower position, to hold the supportingarm 48 in its inactive position, that is with its lower end retracted into the vslot 38.

This: latchl 461 isrretainedin: positionibyfa trans"- verse retainer 48 which is seated in a vertically4V elongated notch. 49.y in the latch andwhichis suitably fastened to thebarrel 21.11 I

When the tool is ininoperative; or inactivemo'-l sition theA latch 4Iiis. in. its lowerrpositionl' with:v the shoulder: 45- seated in the. notch 421' and' said- Alatch-i is temporarilyy retained in saidv lower "posi-Af tion by means of a shearpinf 50?,- asfisfbest illustrated in Figure 2. The:v latch 46 slides in a ver'- tical groove 5 Iv cuttirr the external surfaceof the barrel 21'Yand in substantialvalignment withv thel groove" 39.. The` latch 46` hasi an upward extension 46a. which is provided? with a-vertical slot-5 I;

Pivotally mounted in the slot` 5I4r andlon tl'iei body 21 there is arv trigger-52; This trigger "isi-of. asemi-circularv shapewith itsstraigh-t edgefnorf'V mally held in `af ilush relation Withthe'surfa'ce of" thebarrel 21"l: y-4 means of av tensioni spring 53,. one` endi ofwhich is attached tothe. stationary' axisf pin 54fon which the trigger worksand'whose' other:` end i's-atta'ched'to the trigger. The curvedl margin of the trigger 52v works in tl'ieslot 5I', as" shown in Figures 5 and 7.

When it isdesired to run the` tool into the pipe inr a well the latch 48 will be interengagied'with.A theupper end of the supporting arm40, Ias ist indicated iin Figure 2, and' will'be maintained iIL thaty position `by the shear pinl 50.' and" justbeforethe' triggerl enters the upper end of the pipes.` it will befswun'g around in a clockwise. direction. as indicated inrFigure 2", so that itszouter endlwilll rideagainst the inner surfaceof the pipe.y

As the tool' is lowered'` the. trigger. 52jvrililpass;`

the pipe couplings freely without engaging therel in and the lower end of thesupportinggarm 40 will be held retracted' into the groove38, asf shownin Figure 2. When. ay pointzh-as-.beenr reached where it is, desired` tov operatetheftool the tool: may be. pulled upwardly and. the outer' end ofelthe` trigger` 52r will engage-in .the` coupling aboveeand the outer. end of said trigger will be therebyl-ieldf and as vthe tool is moved further upwardly-fthe: innervl endxof ther trigger will engage the upper'. end of the slot 5I thus exerting'anv upward'pulli on thee-ranch, shearingr the pin so and releasing. the latch from the upper endofi'thef supporting'1 arm 40 and'thereuponthejspring 4I willf'orce. y

thelower end-of the supporting arm outwardlyA into the position shown in Figure 5 andwherithe'v tool. isithe'n lowered" the; supportingarm. 48. engage inthe" next succeeding collar beneatl'mind.l thus securely support the toolin theewellpipet the 'desired location-.asv indicated inFigure, 5;" .I :j

The jars may then be operated. Any type of jars may be employed. As shown the jars include a hammer 55 to whose upper end the cable 26 is secured and upon suitable manipulation of the cable the hammer 55 may be dropped against the upper end of the firing pin 29 thus causing the point 22 of said pin to perforate the disc 2l and fire the primer cartridge I which ignites the main charge I4. The explosion will rupture the disc I5 and a high pressure will be suddenly created in the expansion chamber I1 which will suddenly drive the plunger 3 outwardly forcing the bushing 1 through the well pipe 56, as is indicated in Figure 6. As hereinbefore indicated,

Y the forward end of the bushing is so formed that the bushingr will readily penetrate the pipe and the external ribs on the bushing will embed themselves into the material of the pipe around the punched hole so as to maintain the bushing in` the pipe.

The bushing may be detachably secured to the plunger 3 in any preferred manner. As illustrated in Figure 4 it is gripped by the gripping fingers 51 on the forward end of the plunger 3 which will release the bushing when the bushing is punched into the pipe.

The gland I9 is provided with a plurality of radial exhaust ducts 58 to permit an exhaust of a portion of the pressure from the explosion and upon forward movement of the plunger 3 the exhaust passageway 34 will be partially cleared by the plunger and will rupture the disc 33 thus forcing the plunger 30 downwardly, shearing the pin 35 and the head 3| will finally land on the shoulder 31 clearing the exhaust openings 36 to allow a free exhaust.

After the insertion of the bushing the tool may then be elevated and the trigger 42 will assume its normal position, as shown in Figure 7, and the lower end of the slot 38 will engage the lower end of the narrow key 42 operating to retract the supporting arm 40 into the slot 39, as shown in Figure 7, and the tool may then be readily withdrawn from the well pipe.

Should the inserting tool become stuck in the well an upward pull may be exerted on the cable 26 suilicient to shear the pins 24 and remove the cap 23 which may be drawn to the ground surface and any conventional type of grapple,

of sufficient strength for the purpose, may then be lowered into the well pipe and engaged over the external annular flange 59, provided for the purpose on the upper end of the gland I9 and the inserting tool may then be withdrawn from the Well.

The drawings and description are illustrative merely while the broad principle of the invention will be dened by the appended claims.

What I claim is:

1. A well tool for punching an orifice bushing into a pipe in a well comprising, a housing having an expansion chamber therein and an explosion chamber associated with the expansion chamber said housing having a bore in communication with the expansion chamber and opening outwardly through the wall of the housing. a bushing in the bore having an orifice therethrough, a bushing carrier movably positioned in the bore adjacent the inner end of the bushing means releasably connecting the bushing to the carrier, means in the bore engageable with the carrier to limit outward movement of the carrier in the bore, said carrier having a cavity therein positioned to provide an extension of the expansion chamber, means for creating an explosion in the tool to cause expansion of the fluid in the expansion chamber to drive the carrier and bushing radially outwardly to force the bushing to punch the pipe.

2. A well tool for punching an'orice bushing into a pipe in a well comprising, a housing having an expansion chamber therein and an explosion chamber associated with the expansion chamber, said housing having a bore in communication with the expansion chamber and opening outwardly through the wall of the housing, a bushing in the bore having an orifice therethrough, a bushing carrier movably positioned in the bore adjacent the inner end of the bushing, said carrier having a cavity therein positioned in communication with said expansion chamber, means releasably connecting the bushing to the carrier, means in the bore engageable with the carrier to limit outward movement of the carrier in the bore, means for creating an explosion in the tool to cause expansion of the fluid in the expansion chamber to drive the carrier and bushing radially outwardly to force the bushing to punch the pipe.

3. A well tool of the character described comprising, a housing having an expansion chamber therein and an explosion chamber associated with the expansion chamber, said housing having a bore in communication with the expansion chamber and opening outwardly through the Wall of the housing, a bushing in the bore having an orifice therethrough, a bushing carrier in the bore adjacent `the inner en'd of the bushing and having a cavity in its inner end, means for positioning said carrier in the bore with said cavity in communication with said expansibl'e chamber, said housing having an exhaust passageway opening into said expansion chamber and normally closed by said carrier, means for creating an explosion in the tool to cause expansion of the fluid in the expansion chamber to drive the carrier and bushing outwardly to force the bushing to punch the pipe and to open the exhaust passageway.

OTIS T. BROYLES.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,466,968 Smith Sept. 4, 1923 1,715,508 McEvoy, Jr June 4, 1929 1,811,235 King June 23, 1931 2,064,503 Temple, Jr. Dec. 15, 1936 2,212,044 Ridley Aug. 2:0, 1940 2,213,435 Temple, Jr Sept. 3, 1940 2,218,802 McCullough Oct. 22, 1940 2,263,412 Armentrout Nov. 18, 1941 2,349,666 McCullough Mar. 23, 1944 2,381,929 Schlumberger \Aug. 14, 1945 2,387,456 McDonald Oct. 23, 1945 2,400,878 Dunn May 28, 1946 2,426,106 Kinley Aug. 19, 1947 2,482,913 Jobe Sept. 27, 1949 

